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16.11.2020 •
Mathematics
Carlos pays $25 for skis and borrows the remaining amount. The loan payments are $75 every 3 months for one and a half years. The interest rate is 16.2%/a compounded quarterly. What was the selling price of the skis?
a) $392.52
b) $417.52
c) $367.52
d) $523.10
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Ответ:
(C) 18(1 + √ 3)
Step-by-step explanation:
Given,
In triangle ABC,
AC = 12 unit,
m∠A = 30°,
m∠B = 45°,
Let D∈AB such that CD ⊥ AB,
In triangle ADC,
By the pythagorean theorem,
Now, in triangle CDB,
Hence, the area of the triangle ABC =![\frac{1}{2}\times AB\times CD](/tpl/images/0223/9876/71152.png)
Option 'C' is correct.